561775165 has 8 divisors (see below), whose sum is σ = 770434560. Its totient is φ = 385217232.

The previous prime is 561775163. The next prime is 561775171. The reversal of 561775165 is 561577165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561775165 - 2¹ = 561775163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561775163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8025325 + ... + 8025394.

It is an arithmetic number, because the mean of its divisors is an integer number (96304320).

Almost surely, 2^561775165 is an apocalyptic number.

It is an amenable number.

561775165 is a deficient number, since it is larger than the sum of its proper divisors (208659395).

561775165 is a wasteful number, since it uses less digits than its factorization.

561775165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16050731.

The product of its digits is 220500, while the sum is 43.

The square root of 561775165 is about 23701.7966618567. The cubic root of 561775165 is about 825.1270890836.

The spelling of 561775165 in words is "five hundred sixty-one million, seven hundred seventy-five thousand, one hundred sixty-five".